Mechanical filter oil stain cleaning agent and preparation method thereof

Abstract

The invention discloses a mechanical filter oil stain cleaning agent and a preparation method thereof, and belongs to the field of wastewater treatment. The mechanical filter oil stain cleaning agent disclosed by the invention comprises the following raw materials in percentage by mass: 10 to 202 percent of sodium hydroxide, 5 to 15 percent of ethanol, 0.1 to 0.5 percent of sodium dodecyl benzene sulfonate, 0.1 to 0.5 percent of sodium tripolyphosphate and the balance of desalinated water, wherein the concentration of Ca<2+> in the desalinated water is less than or equal to 2 mg/L. The preparation method comprises the following steps: weighing the raw materials; adding the ethanol into the desalinated water; adding the ethanol into the desalinated water; adding the sodium hydroxide, the sodium dodecyl benzene sulfonate and the sodium tripolyphosphate in sequence; uniformly stirring after a new material is added everytime so as to uniformly mix or dissolve the materials to obtain the mechanical filter oil stain cleaning agent. The mechanical filter oil stain cleaning agent disclosed by the invention has a saponification effect, and also has the effects of emulsifying, wetting, permeating, dispersing and dissolving, so that the mechanical filter oil stain cleaning agent disclosed by the invention has the advantages of high efficiency of removing intractable oil stain and high cleaning speed.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to a mechanical filter oil dirt cleaning agent and a preparation method thereof. Background technique [0002] In the process of hot rolling and continuous casting in iron and steel enterprises, the secondary cooling zone is in a high-temperature state, and the water directly contacts with the high-temperature rolled pieces and billets, and is polluted by heat, causing the water temperature to rise sharply. During the spray cooling of the steel billet, iron oxide scales and dust with different particle sizes are brought into the water, which increases the content of suspended solids and turbidity in the water. The direct cooling water of the rolling mill during the rolling process contains a large amount of iron oxide scale, lubricating oil and grease. The oil and grease are mainly the leakage and maintenance leakage of the hydraulic component cylinder. During the operation and...

AI Technical Summary

Problems solved by technology

Iron and steel enterprises add agents such as polyaluminum chloride and polyacrylamide to demulsify and coagulate the oil, and at the same time make the fine iron powder gather into larger particles and settle down in the secondary sedimentation tank, and then remove the fine iron oxide and oil by flocculation and sedimentation. However, there is still a small amount of oil and fine suspended matter in the water. Only by removing the fine particles and oil in the water can the normal progress of subsequent production be ensured. Therefore, many iron and steel enterprises have set up filtration systems in the process of secondary cooling water treatment. Secondary sedimentation tanks The effluent is filtered through the filter, and the fine particles containing oil, iron powder and dust are trapped in the filter. After the filter is used for a long time, the intercepted matter will adhere to the filter material due to the oil content, blocking the filter channel, and the filter is filtered. The failure of the material board will affect the filtering effect. At this time, the filter needs to be backwashed. When washing, the dirt adhering to the filter medium needs to be peeled off to improve the backwashing effect.

[0003] At present, units that need to clean mechanical filters use caustic soda solution to clean directly, which cannot effectively clean the oil stains adhering to the filter medium.